Wall or chimney construction.



`PATENTED FEB. 3, 1903. J. F. LYMAN. WALL 0R GHIMNEY CONSTRUCTION.

APPLICATION HLED Mu 1s, 1901. RBNEWBD ooT. 6, 1902.

I0 MODEL.

UNTTED STATES PATENT OFFICE.

JONATHAN F. LYMAN, OF SOUTH SAN FRANCISCO, CALIFORNIA.

WALL OR CHIMNEY CONSTRUCTION.

SPECIFICATION forming part of Letters Patent N o. 719,679, datedFebruary 3, 1903.

Application filed May 13, 1901. Renewed October 6, 1902. Serial No.126,134. (No model.)

To aZZ whom, it may concern,.-

Beit known that I, JONATHAN F. LYMAN, a citizen of the United States,residing at South San Francisco, county of San Mateo, State ofCalifornia, have invented an Improvement in Wall or ChimneyConstruction; and I hereby declare the following to be a full, clear,and exact description of the same.

My invention relates to improvements in the construction of walls,chimneys, and like structures.

It consists in a means for building such structures, as concrete, withone or more hollow tubular openings formed within the structure andextending from the bottom to the top.

It also comprises details of construction which will be more fullyexplained by reference to the accompanying drawings, in which-- Figure lis a vertical section through the device. Fig. 2 is a top view ofthesame. Fig. 3 shows conduits in a street made with my device.

In the construction of chimneys having one or more ilues, or of wallsfor buildings in which such passages are to be made, either to be usedas chimneys or for the convenient laying of gas and water pipes,electric and other conducting wires, or for heat-passages for furnaces,it is desirable to form such walls by building them up continuously ot'concrete and simultaneously forming the open passages from bottom totop. In order to build the walls and continuously extend these passages,Iemploy forms or molds between which the concrete is tamped, and withinthe space between the walls are other forms, which are so placed as toform the continuous openings within the walls.

As herein illustrated, I have shown a central shaft or standard A, whichmay have a suitable handle 2 at the upper end. Around this standard orshaft is fitted a slidable sleeve 3 with handles 'l, by which it may bemoved up or down. Hinged to the sides of this sleeve are rods 5, whichradiate outwardly, and their outer ends are hinged or similarlyconnected with ribs or lugs 6, and these are attached to the cylindricalsegments 7. These segments may be as many in number as desirable. I havehere shown four, the edges of which overlap, so that they may be drawnin toward each other and toward the center or expanded outwardly, thisoperation being produced by either pushing down the sleeve 3 or drawingit upward. The segment 7 may be of any suitable or desired length withinthe convenient capacity of the apparatus, and so as to form the Wall orstructure in successive intervals of four or five feet, more or less, inheight. The segments have the connecting-rods 5 at the top and bottom orat any suitable intervals, and when the wall, chimney, or otherstructure is to be built these devices are set in position by pulling upon the handles 4. The segments 7 are pushed outwardly by theconnecting-rods 5 until they form cylinders. The sleeves may be lockedin this position in any suitable or desired manner. I have here shown aslot 8 made longitudinally in the sleeve and having a turn or eX-tension 9 at right angles, forming what is known as a bayonet-lock. Apin l0, projecting from the shaft A, enters the slot and allows thesleeve to be moved up or down with relation to it. When the sleeve ismoved so as to expand the sections 7, as before described, it may belocked by turning, so as to engage with the pin, and thus hold the partsin position. The concrete is then tamped in between the outer walls andaround the segmental cylinder until a space has been filled equal to thelength ot' the cylinder. After the mass has sufticiently set thesegments are retracted inwardly by disengaging the sleeve from its lockand moving it, so as to shorten the rods 5, and thus draw the segmentsinwardly and clear of the inner Walls of the tubes which they haveformed, when the device can be raised and again set, so as to form anextensionof the tube, and so on until the wall has been built to anydesired height. This enables me to maintain the tubular openingsessentially straight and smooth, and the form is prevented from adheringto the surrounding material, which would other wise prevent its beingremoved by the means for contractingit, as herein described. Spurs 12are carried by the lower arms, and when the segments are expanded thesespurs are projected through the sides and into the surrounding concrete,so as to lock thedevice in place.

It will be understood that the tubular con- ICO struction here describedcan be made horizontally as Well as vertically.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. An apparatus for the formation of tubular chimneys and likestructures, consisting of segmental overlapping plates, a central shafthaving a sleeve slidable thereon, locking means between the shaft andsleeve by which the latter is held in position, and connections betweensaid sleeve and the plates whereby the latter may be expanded orconiracted.

2. An apparatus for the construction of tubular chimneys and likestructures consisting of segmental sheets having overlapping edges, acentrally-disposed shaft, a sleeve slidable thereon, rods hinged to thesleeve and to the interior of the segments, means whereby the means forlocking the sleeve to hold the segmental plates in position.

In witness whereof I have hereunto set my hand.

JONATHAN F. LYMAN.

Vitnesses:

S. H. N oURsE, J Essrn C. BRODIE.

